Buggy code:
public class ProjectHelper2 extends ProjectHelper { static ProjectHelper2 . AntHandler elementHandler = new ProjectHelper2 . ElementHandler ( ) ; static ProjectHelper2 . AntHandler targetHandler = new ProjectHelper2 . TargetHandler ( ) ; static ProjectHelper2 . AntHandler mainHandler = new ProjectHelper2 . MainHandler ( ) ; static ProjectHelper2 . AntHandler projectHandler = new ProjectHelper2 . ProjectHandler ( ) ; private static FileUtils fu = FileUtils . newFileUtils ( ) ; public void parse ( Project project , Object source ) throws BuildException { } public void parse ( Project project , Object source , ProjectHelper2 . RootHandler handler ) throws BuildException { ProjectHelper2 . AntXmlContext context = handler . context ; if ( source instanceof File ) { context . buildFile = ( ( File ) ( source ) ) ; } else { throw new BuildException ( ( ( "Source<seq2seq4repair_space>" + ( source . getClass ( ) . getName ( ) ) ) + "<seq2seq4repair_space>not<seq2seq4repair_space>supported<seq2seq4repair_space>by<seq2seq4repair_space>this<seq2seq4repair_space>plugin" ) ) ; } FileInputStream inputStream = null ; InputSource inputSource = null ; context . buildFile = new File ( context . buildFile . getAbsolutePath ( ) ) ; context . buildFileParent = new File ( context . buildFile . getParent ( ) ) ; try { <START_BUG> context . parser = JAXPUtils . getXMLReader ( ) ; <END_BUG> String uri = ProjectHelper2 . fu . toURI ( context . buildFile . getAbsolutePath ( ) ) ; inputStream = new FileInputStream ( context . buildFile ) ; inputSource = new InputSource ( inputStream ) ; inputSource . setSystemId ( uri ) ; project . log ( ( ( ( "parsing<seq2seq4repair_space>buildfile<seq2seq4repair_space>" + ( context . buildFile ) ) + "<seq2seq4repair_space>with<seq2seq4repair_space>URI<seq2seq4repair_space>=<seq2seq4repair_space>" ) + uri ) , MSG_VERBOSE ) ; DefaultHandler hb = handler ; context . parser . setContentHandler ( hb ) ; context . parser . setEntityResolver ( hb ) ; context . parser . setErrorHandler ( hb ) ; context . parser . setDTDHandler ( hb ) ; context . parser . parse ( inputSource ) ; } catch ( SAXParseException exc ) { Location location = new Location ( exc . getSystemId ( ) , exc . getLineNumber ( ) , exc . getColumnNumber ( ) ) ; Throwable t = exc . getException ( ) ; if ( t instanceof BuildException ) { BuildException be = ( ( BuildException ) ( t ) ) ; if ( ( be . getLocation ( ) ) == ( Location . UNKNOWN_LOCATION ) ) { be . setLocation ( location ) ; } throw be ; } throw new BuildException ( exc . getMessage ( ) , t , location ) ; } catch ( SAXException exc ) { Throwable t = exc . getException ( ) ; if ( t instanceof BuildException ) { throw ( ( BuildException ) ( t ) ) ; } throw new BuildException ( exc . getMessage ( ) , t ) ; } catch ( FileNotFoundException exc ) { throw new BuildException ( exc ) ; } catch ( UnsupportedEncodingException exc ) { throw new BuildException ( "Encoding<seq2seq4repair_space>of<seq2seq4repair_space>project<seq2seq4repair_space>file<seq2seq4repair_space>is<seq2seq4repair_space>invalid." , exc ) ; } catch ( IOException exc ) { throw new BuildException ( ( "Error<seq2seq4repair_space>reading<seq2seq4repair_space>project<seq2seq4repair_space>file:<seq2seq4repair_space>" + ( exc . getMessage ( ) ) ) , exc ) ; } finally { if ( inputStream != null ) { try { inputStream . close ( ) ; } catch ( IOException ioe ) { } } } } public static class AntHandler { public void onStartElement ( String uri , String tag , String qname , Attributes attrs , ProjectHelper2 . AntXmlContext context ) throws SAXParseException { } public ProjectHelper2 . AntHandler onStartChild ( String uri , String tag , String qname , Attributes attrs , ProjectHelper2 . AntXmlContext context ) throws SAXParseException { } public void onEndChild ( String uri , String tag , String qname , ProjectHelper2 . AntXmlContext context ) throws SAXParseException { } public void onEndElement ( String uri , String tag , ProjectHelper2 . AntXmlContext context ) { } public void characters ( char [ ] buf , int start , int count , ProjectHelper2 . AntXmlContext context ) throws SAXParseException { } protected void checkNamespace ( String uri ) { } } public static class AntXmlContext { public Project project ; public File buildFile ; public Vector targetVector = new Vector ( ) ; public File buildFileParent ; public String currentProjectName ; public Locator locator ; public ProjectHelper2 helper ; XMLReader parser ; public Target implicitTarget = new Target ( ) ; public Target currentTarget = null ; public Vector wStack = new Vector ( ) ; public Hashtable namespaces = new Hashtable ( ) ; public boolean ignoreProjectTag = false ; public Hashtable importedFiles = new Hashtable ( ) ; public int importlevel = 0 ; public AntXmlContext ( Project project , ProjectHelper2 helper ) { } public Project getProject ( ) { } public RuntimeConfigurable currentWrapper ( ) { } public RuntimeConfigurable parentWrapper ( ) { } public void pushWrapper ( RuntimeConfigurable wrapper ) { } public void popWrapper ( ) { } public Vector getWrapperStack ( ) { } public void configureId ( Object element , Attributes attr ) { } } public static class RootHandler extends DefaultHandler { private Stack antHandlers = new Stack ( ) ; private ProjectHelper2 . AntHandler currentHandler = null ; private ProjectHelper2 . AntXmlContext context ; public RootHandler ( ProjectHelper2 . AntXmlContext context ) { } public InputSource resolveEntity ( String publicId , String systemId ) { } public void startElement ( String uri , String tag , String qname , Attributes attrs ) throws SAXParseException { } public void setDocumentLocator ( Locator locator ) { } public void endElement ( String uri , String name , String qName ) throws SAXException { } public void characters ( char [ ] buf , int start , int count ) throws SAXParseException { } }

Fix:
context . parser = JAXPUtils . getNamespaceXMLReader ( ) ;